Draft-regulating device



July 24, 1923.

L. ROTH LAMP FIXTURE FOR BEDS AND was LIKE Filed Feb. 23. 1921 PatentedJuly 24, 1923.

wmmm SPEAS PETER THOMSEN, OF CASSEL, GERMANY, ASSIGNOR TO SCHMIDTSCHEHEISSDAMPF GESELLSCHAFT M. B. EL, 0}? CASSEL-W'ILEELMSHOHE, GERMANY, ACORPORATION OF GERMANY.

DRAFT-BEGULATING DEVICE.

be provided with a curved if desired be secured fixedly in position onthe member A by means other than "the screw 6.

An incandescent lamp, lines at F, is coupled as usual not shown, theflow of current to said lamp being controlled by the customary pullswitch 7. Said stem B is provided with a male thread If on which isscrewed a nut Gr adapted to'be tightened against a washer 9 whereby thefixtur may be clamped against the element H or H of a bedstead, or otherobject.

Collar C is composed of metal centrally perforated to slip over the stemB, it being essential in this invention that said collar face 0 and aplane face 0. The curvature of the faces corresponds to the face (6 ofthe head in order that the collar may have a solid hearing against thehead, whereby the collar is made available for leveling up thehead so asto adapt the fixture for service on plane surfaced bed-elements such asH in Figure 1.

lVasher D is composed of rubber, leather, or other con'ipressiblematerial, and it is centrally perforated to fit upon the stem, saidwasher being interposed between the collar C and the bed element H. Thewasher is shown as having transverse apertures (Z presenting. airpockets, and when the nut G is screwed home the stem and the head act tocompress the washer between the collar 0 and the bed-element H, wherebythe trictional contact of th washer with the collar and the bed-element,aided probably to some extent by the air confined within the pockets d,retains the head and the stem so firmly in position that the fixture andthe lamp cannot be shifted accidentally out of position nor will theclamping means loosen up to such an extent as to permit undesirableindicated by dotted shifting movement oi": the lamp.

When the fixture is used on a bedstead of the type indicated at H inFigur 1, a hole is produced in the part H, and the collar C and washer Dare slipped over the stem, after which the stem is thrust through thehole, washer g is positioned on the stem,

with a socket,

with which said curved ees res and nut G is screwed tightly into place,the etl ect or" which is to compress the washer D between th collar Gand the bed-element and to so tightly clamp the member A and collar G asto preclude the lamp housing from turning out of its operative position.

To adapt theiixture to a curved'rail H of a metal bedstead, the collar Cand washer D are dispensed with. A hole having been provided in thebedrail as shown in Figure 2, the stem B is thrust through it for thecurved :t'ace cot the-member A to have contact directlywith the bedrail,and thereupon the washer g and nut G- are applied to the stem fordrawing the curved face a of said member it, into such tight contactwith the bedrail that the lamp housing cannot be turned accidentally outof the desired position.

It is apparent that easily and quickly to any or other object. and thatin position. I

Having thus fully described the invention, what I claim as new anddesire to secure by Letters Patent is 2,

ii lamp-fixture adapted for use on articles of furniture comprising ahead one face at which is curved in conformity. with the contour of thesurface of the article face is adapted to contact, a single stem inpermanently fixed relation to said head, said stem passing through saidcurved face only of the head and protruding for a substantial distancebeyond said head to afford means for the attachment or said fixture, aperforated collar fitted loosely and removably on the stem, one face ofsaid collar being curved for snug contact with the curved face of thehead andthe otherside ofsaid collar being a plane surface, and meansco-operating with'the stem forclamping the collar" and the headin fixednon-rotative relation to each other and to th article-of furniture.

In testimony whereof I have hereto signed my name this 17th dayofFebruary, 1921.

Louis Born.

the fixture is applied kind of bedstead, it is held securely groups andelements forming separate paths for the gases passing through therespective groups, a draft pipe having branches connected with therespective paths, and a damper located at the junction of the branchesand controlling their connection with the main portion of said pipe.

6. In a boiler or the like, a structure having tubes arranged in aplurality of groups and elements forming separate paths for the gasespassing through the respective groups, draft devices connected with therespective paths, and means for regulating the effective cross sectionof said devices, to produce different velocities of the gases travellingthrough different paths.

7. In combination a boiler having tubes arranged in groups, a smoke boxdivided into compartments each of which communicates with the tubes ofone group, draft devices connected with the respective smoke boxcompartments, and means for controlling said draft devices.

8. In combination a boiler, having tubes arranged in groups, a smoke boxdivided into compartments each of which communicates with the tubes ofone group, draft devices connected with the respective smoke boxcompartments, separate stack outlets for each compartment, and means forcontrolling said draft devices.

9. A boiler having tubes arranged in groups and a smoke boxcommunicating with said tubes, a horizontal partition and a transversevertical partition which together divide said smoke box into separatecompartments communicating with the tubes of the respective groups,draft devices connected with the respective compartments, and means forcontrolling said draft devices.

10. In combination a boiler having tubes arranged in groups, a smokebox, an upright longitudinal partition which divides said smoke box intoseparate compartments communicating with the tubes of the respectivegroups, draft devices connected with the respective compartments, andmeans for controlling said draft devices.

11. In a boiler or the like, a structure having tubes arranged in aplurality of groups, a chamber divided into separate compartments eachcommunicating with the tubes of one group, draft devices connected withthe respective compartments, and selective means whereby any one of saiddraft devices may be shut ofi entirely from the respective compartment.

In testimony whereof I have hereunto set my hand.

PETER THOMSEN. Witnesses:

E IoUs DoEssLorr, MAX Hnnzn.

